:root {
  --bg: #ffffff;
  --fg: #1a1a1a;
  --fg-dim: #5a5a5a;
  --accent: #2056c7;
  --rule: #e6e6e6;
  --max-w: 720px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14161a;
    --fg: #ececec;
    --fg-dim: #a5a5a5;
    --accent: #7aa6ff;
    --rule: #2a2d33;
  }
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 18px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
}

a {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 2px;
}
a:hover { opacity: 0.75; }

/* Header */
.page-header {
  padding: 56px 0 24px;
  border-bottom: 1px solid var(--rule);
  margin-bottom: 8px;
}
.page-header h1 {
  font-size: clamp(1.8rem, 4.5vw, 2.4rem);
  margin: 0 0 6px;
  letter-spacing: -0.01em;
}
.byline {
  margin: 0;
  color: var(--fg-dim);
  font-size: 1rem;
}

/* Sections */
main { padding: 16px 0 32px; }
section {
  padding: 24px 0;
}
section + section {
  border-top: 1px solid var(--rule);
}
section h2 {
  font-size: 1.35rem;
  margin: 8px 0 14px;
  letter-spacing: -0.005em;
}
section p {
  margin: 0 0 1em;
}

/* Figures */
figure {
  margin: 22px 0 6px;
}
figure img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 8px;
  background: var(--rule);
}
figcaption {
  margin-top: 8px;
  font-size: 0.9rem;
  color: var(--fg-dim);
  font-style: italic;
}
figcaption:empty { display: none; }

/* Contact */
.contact ul {
  list-style: none;
  padding: 0;
  margin: 8px 0 0;
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
}

/* Footer */
.page-footer {
  padding: 32px 0 48px;
  border-top: 1px solid var(--rule);
  color: var(--fg-dim);
  font-size: 0.9rem;
  text-align: center;
  margin-top: 32px;
}

/* Mobile tweaks */
@media (max-width: 600px) {
  html, body { font-size: 17px; }
  .page-header { padding-top: 40px; }
}